Li Canpeng, Xie Xuesong, Liu Hui, Wang Pinji, Deng Canbin, Lu Bingan, Zhou Jiang, Liang Shuquan
School of Materials Science and Engineering, Key Laboratory of Electronic Packaging and Advanced Functional Materials of Hunan Province, Central South University, Changsha 410083, China.
School of Physics and Electronics, Hunan University, Changsha 410082, China.
Natl Sci Rev. 2021 Sep 15;9(3):nwab177. doi: 10.1093/nsr/nwab177. eCollection 2022 Mar.
Many optimization strategies have been employed to stabilize zinc anodes of zinc-ion batteries (ZIBs). Although these commonly used strategies can improve anode performance, they simultaneously induce specific issues. In this study, through the combination of structural design, interface modification, and electrolyte optimization, an 'all-in-one' (AIO) electrode was developed. Compared to the three-dimensional (3D) anode in routine liquid electrolytes, the new AIO electrode can greatly suppress gas evolution and the occurrence of side reactions induced by active water molecules, while retaining the merits of a 3D anode. Moreover, the integrated AIO strategy achieves a sufficient electrode/electrolyte interface contact area, so that the electrode can promote electron/ion transfer, and ensure a fast and complete redox reaction. As a result, it achieves excellent shelving-restoring ability (60 hours, four times) and 1200 cycles of long-term stability without apparent polarization. When paired with two common cathode materials used in ZIBs (-MnO and NHVO), full batteries with the AIO electrode demonstrate high capacity and good stability. The strategy of the 'all-in-one' architectural design is enlightened to solve the issues of zinc anodes in advanced Zn-based batteries.
许多优化策略已被用于稳定锌离子电池（ZIBs）的锌负极。尽管这些常用策略可以改善负极性能，但它们同时也引发了一些特定问题。在本研究中，通过结构设计、界面修饰和电解质优化相结合，开发了一种“一体化”（AIO）电极。与常规液体电解质中的三维（3D）负极相比，新型AIO电极可以极大地抑制由活性水分子引起的气体析出和副反应的发生，同时保留3D负极的优点。此外，集成的AIO策略实现了足够的电极/电解质界面接触面积，从而使电极能够促进电子/离子转移，并确保快速且完全的氧化还原反应。结果，它实现了出色的搁置恢复能力（60小时，4次）和1200次循环的长期稳定性，且无明显极化。当与ZIBs中使用的两种常见正极材料（MnO和NHVO）配对时，采用AIO电极的全电池表现出高容量和良好的稳定性。“一体化”架构设计策略为解决先进锌基电池中锌负极的问题提供了启示。
